Adjusting device for cylinder grinders



F M. KERN 2,058,464

ADJUSTING DEVICE FORCYLINDER GRINDERS Oct. 27, 1936.

Filed Feb. s, 1928 2 sheets-sheet 1 l NIU oct. 27, 1936.

F. M. KERN 'ADJUSTING DEVICEIOR CYLINDER GRINDERS' 2 'sheets-sheet 2 Filed Feb. 5, 1928 Patented Oct. 27, 1936 ERS Fred M. Kern, Detroit, Mich., assigner, by mcsne assignments, to The Carborundum Company, Niagara Falls, N. Y., a corporation of Pennsyivania Application February s, 192s, sei-iai No. 251,552

c claims. (ci. 511s4.3)

This invention relates to a grinding device adapted to lap or grind the bore of cylinders or cylindrical openings and more particularly a device of this character in which a plurality of abrasive'members are mounted on a supporting head or body, so that the same can be adjusted radially thereon for adapting the diameter of the tool to the size of the opening which is to be ground.

I [n grinding devices of this character as heretofore constructed, it has usually been necessary to disconnect the grinding device fromthe driving mechanism in order to gain access to the mechanism whereby the position of the grinding 15 stones or abrasive members on the supporting body` were adjusted which not only interrupted the operation of the machine but was also attended with inconvenience and increased cost in doing the work in ha d.

It is the object of this invention to provide means forl adjusting the position of the abrasive members from the exterior of the tool so as to avoid the necessity of dismounting the same, and more particularly an adjusting device having g5 this capacity which permits o-i effecting this adjustment on grinding devices of a type already in use and thereby adapting this adjusting device to 'such tools without requiring any material structural alterationin the same'.

In the accompanying drawings Fig. 1 is a side elevation of a. grinding device equipped with the improved form o! adjusting mechanism for the abrasive members. I

Figure 2 is a longitudinal section of the same.

Figures 3, 4, and 5 are cross sections taken on the correspondingly numbered lines in Fig. 2.

In the following description the same reference characters indicate like parts in the several iigures of the drawingsz- The adjusting mechanism is applicable to grinding devices which may vary to some extent in the details of construction and the 'grinding devices shown in the accompanying drawings may therefore be regarded as merely typical of one 45 form of such device which is suitable for use in connection with the present invention.

In its general organization the grinding device shown in the accompanying drawings, is constructed as foll'ows:-

The numeral II) represents a supporting head or body having a longitudinal bore I I and a plurality of transverse guide openings I2. Within the longitudinal bore are arranged two opposed adjusting cones I3, I4 arranged respectively in 55 the upper and lower parts of this bore and adjustably connected with each other` by means of a. screw I5, the head I6 at the upper end o! which bears against an upwardly facing shoulder IIl on the upper cone while the threaded lower end I8 f5! of this groove engages with the lower cone I4. i" Upon tightening this screw, the cones approach each other, and upon loosening this screw the cones are spread apart by means of spring IB sur- /rounding this screw and bearing at its opposite ends against these cones, as shown in Fig. 2.

Surrounding the supporting head 'or body is an annular set of abrasive carriers, eachof which is mounted on the supporting head and adjusted radially thereon by means of the cones. Each of these carriers in the form shown in the drawings, comprises a longitudinal supporting bar or holder which is provided on its outer side with one of the abrasive members or stones 2|, while its l inner side is providedvwith a pair of inwardly projecting guide pins 22 which slide in a pair of 20 these guide openings Il. in the suppOiting head and engage at their inner end's with the conical surfaces of the two cones on the supporting head.

Each of these carriers is yieldingly held in its innermost position by a spring device consisting preferably of a wire spring 23 secured to the exterior of the supporting head and bearing at its opposite ends against the guide pins I2 of the respective carrier so that these pins are always maintained in engagement with the tapering surfaces of the cones.

At its upper end the supporting body is provided with an upwardly projecting tubular extension 24 which latter is provided on its opposite l sides with bayonet slots 25 one of which is shown 35 in Fig. 1.

Ordinarily the upward extension 24 of the supporting head is connected directly with a driving spindle whereby the tool Is rotated and also reciprocated in the cylindrical hole or bore of the cylinder which is being ground and in such an installation it is necessary to dismount the grind- .n er whenever access is required to the head I6 of the adjusting bolt for expanding or contracting the several abrasive carriers as the work of grinding progresses. Instead, however, of using an ordinary driving spindle a speciaiform of driving spindle is used in the present case and adjusting means are associated with this spindle and the cone adjusting screw which permits oi' adjusting the position of the abrasive members from the exterior of the spindle without requiring the tool to be disconnected from the spindle.

For this purpose the driving spindle in the present case consists of an upper solid section 26 and a lower tubular section 21 which latter isconnected at its lower end with the tubular j extension on the supporting head by means of an` universal joint in order to permit the grinding device to play laterally relatively to the driving spindle and adapt itself to the surface which is being ground. In its ,preferred form this universal joint consists of a'spherical knuckle 28 arranged on the exterior of the tubular spindle section 21 at the lower end thereof and arranged within the bore of the head extension 24, and provided on its opposite sides with coupling pins 29, each of which engages withan undercut seat 30 on the inner part of one of the bayonet slots 25, as shown in Fig.. 1.

Owing to the direction of rotation of the driving spindle being toward the closed end of this bayonet slot these parts always remain coupled, while the tool is in operation, but when it is desired to uncouple these parts it is only necessary to move the grinding device forwardly independently of the spindle a distance sucient lto' permit the coupling pins 30 to be disengaged from the bayonet slots above referred to.'

The upper and lower sections of' the spindle are preferably connected with eachgother by means of a screw joint 3l as shown in Fig.A 2 and the upper section is adapted to be connected with any means whereby the same may be driven either manually or by power. The upper part of the bore of the lower spindle section 21 is of comparatively large diameter and the lower part of this bore of relatively smaller diameter, thereby forming an upwardly facing internal shoulder 32 within the lower spindle section which is preferably of spherical form, as shown in Fig. 2. The means whereby the cone adjusting screw maybe turned from the exterior of the driving spindle for adjusting the abrasive members are preferably constructed as follows:-

`Arranged within the enlarged upper bore of the lower spindle section is an adjusting head 33 which is preferably hollow or cup-shaped and provided on its underside with a spherical surf ace 34 which engages with the shoulder 32 of the lower spindle section and therefore in effect forms a ball and socket joint between this/adjusting head and the spindle section. From the lower side of this adjusting head a hollow or tubular neck-35 projects downwardly and is p'rovided at its lower end with an opening 36 which is square or of other suitable rectangular form, the edge of this opening being comparatively narrow or tapered, as shown at 31 in Fig. 2. This adjusting head is adapted to be rotated together with the neck 35 and this rotary movement is transmitted to the adjusting screw I5 by means of an adjusting rod'38, the upper end of which is of square or rectangular form in cross-section, as shown in Fig. 5, and ts into the opening 36 so that these parts are compelled to turn together and s till permit the shifting rod to move lengthwise relatively to the neck 35. At its lower end the adjusting rod 38 is connected by means of a universal joint with the upper end of the adjusting screw I5, this being preferably accomplished by means of a transverse pin 39 secured to the lower end of the adjusting rod 38 and projecting loosely at its opposite ends into openings46 formed in a pocket 4I in the top of the 44 in the adjacent part of the tubular spindle section and adapted to engage with one or another of an annular row of teeth 45 on the upper end of the adjusting head 33. The slot 43 is sufliciently wide to permit the adjusting sleeve 42'to be raised and lowered the required extent for engaging and disengaging the adjusting pin 43 with one or another o f the .teeth 45, and this slot is also of sufficient length circumferentially ofthe tubular spindle 4section to permit of Aturn- Iing or rotating the adjusting sleeve for turning the same circumferentially to an extent equal to the'space between one or more teeth .as desired. Upon engaging the adjusting pin 43 with a tooth of the adjusting head at one end of the slot 44 and then 'moving this pin toward the opposite end ofthe slot by meansof the sleeve 42, it will -result in 4turning the adjusting head 33 in one direction, which motion upon being transmitted by the adjusting rod 38 to the screw I5 will cause the cones to be moved lengthwise relativelyto each other in one direction, while upon engaging the adjusting pin 43 with one of the teeth 45 adjacent to the opposite end of the slot 44 and then moving the sleeve 42 in the reverse direction it will result in turning the adjusting screw I5 in the opposite direction. It is therefore possible by these means to adjust the cones lengthwise relatively to each other by steps which can be either forward or backward and varying in length for the purpose of varying the diameter of the abrasive surfaces of the grinding device to suit the requirements of the particular work which is being operated on.

During this work the adjusting head and its neck 35 are free to tilt or `rock laterally Ato a limited extent and the adjusting rod 38 is also free to swing laterally by reason of the universal connection with the adjusting screw I5 and the engagement of its square sided upper part with the narrow edge 31 of the adjusting neck 35, thereby avoiding cramping of any of the parts and permitting free working of the adjusting mechanism in all the various positions which these parts are likely to assume when in use. The possibility of any cramping action between the adjusting rod 38 and the lower end of the tubular neck 35 is further prevented by arranging the narrow edges 31 of the opening 36 transversely in line with the axis of the pins 29 which form part of the universal connection between the driving spindle and the head of the abrasive device, as shown in Figs. 1 and 2.

In order to hold the adjusting head 33 against its seat 32 on the tubular driving' spindle section and maintain the same in its proper position relatively to the parts with which it cooperates and still permit the same to move with the required degree of freedom for accomplishing its purpose; retaining means are provided 'which preferably consist of a disk 46 engaging with the .It will thus be apparent that by means of this 4 ,mechanism it is possible to effectively drive the vgrinding device and also to adjust the diameter of the grinding device easily and conveniently from the exterior of the tool without requiring the same to be dismounted or interrupting the working of the same for any undue length of time. A

` Moreover this mechanism for driving and ad-v. justing the grinding device permits of readily 'and efilciently using grinding devices which have heretofore been unprovided with external adjusting means with the same facility as grinding devices which vhave been especially constructed to permit of adjustment from the exterior of the same.' Furthermore, all the parts of this adjusting device are of sturdy construction and wellprotected by reason of their location within the interior of the mechanism where they are not likely to become injured and rendered inoperative.

provided with an annular row of teeth; an adjusting sleeve surrounding said tubular section and having a coupling pin adapted to engage with one or another of said teeth for turning said adjusting head, and means for holding said adjusting head against rising in said tubular section, comprising a disk engaging with said head. and a retaining rod secured at its upper end to v the upper partof said spindle and bearing at its resting on said shoulder "and having an annular row'of teeth and a depending tubular neck the lower end of which has an angular opening; a coupling rod connected with said adjusting screw andv having an upper angular part engaging with said angular opening; and an adjusting sleeve surrounding said tubular section and having an inwardly projectingl pin adapted to engage with one or another of said teeth.

3. A grinding device comprising a supporting head; a plurality of abrasivecarriers movable radially on said head; opposed cones slidable lengthwise of said head and engaging with the inner parts of said carriers; a rotary adjusting screw connecting said cones; a driving spindle having a tubular lower section operatively connected with said supporting head; and means for turning said adjusting 'screw including a rotary adjusting head mounted in said tubular section and operatively connected with said screw and provided with an annular row of teeth; -an adjusting sleeve surrounding said tubular section and' having a coupling pin adapted to engage with one or another of said teeth for turning said adjusting head, said adjusting head being free to turn and tilt in said tubular section.

4. A grinding device comprising a supporting head; a plurality of abrasive carriers movable radially on said head; opposed cones slidable radially on said supporting head and engaging with the inner parts f said carriers; a rotary adjusting screw having a head at its upper end engaging with one of said cones and a screw thread on its other end engaging with the other cone; a driving spindle having a lower tubular section provided with an upwardly facing internal shoulder and an adjusting slot in its side above said shoulder; a universal joint connecting the lower endof said tubular section with the upper end of said supporting head; and means for rotating said adjusting screw from the exterior of said spindle including a hollow adjusting head arranged within said tubular section and having` a spherical underside resting on said shoulder, an annular row of upwardly projecting teeth, and a reduced tubular neck arranged within said tubular section and provided at its lower end with an angular opening the edge of which is narrow and arranged in line with said universal joint; a longitudinal coupling rod loosely connected at its lower end by a transverse pin with the head of said adjusting screw and having its upper end of angular cross section and engaging with said opening; an adjusting sleeve surrounding said tubular section and capable of rotary and longitudinal movement thereon; and an adjusting pin projecting inwardly from said sleeve through said adjusting slot and adapted to engage with one or another of said teeth.

5. A grinding device comprising a supporting head; a pluralityV of abrasive carriers movable radially on said head; opposed cones slidable radially on said supporting head and engaging with the inner` parts of said carriers; a rotary adjustingscre'w having a head at its upper end engaging with one of said cones and a screw thread on its other end engaging with the other cone; a driving spindle having a lower tubular section provided with an upwardly facing internal shoulder and an adjusting slot in its side above said shoulder; a universal joint connecting the lower end of said tubular section with the upper end of said supporting head; and' means for rotating said adjusting screw from the exterior of said spindle including a hollow adjusting head arranged within said tubular section and having va spherical underside resting on said shoulder, an

annular row of upwardly projecting teeth, and a reduced tubular neck arranged within said tubular section and provided at its lower end with an angular opening the edge of which is narrow and arranged in line with said universal joint; a longitudinal coupling rod loosely connected at its .lower end by a transverse'V pin with the head of said adjusting screw and having its upper end of angular cross section and engaging with said opening; an adjusting sleeve surrounding said tubular section and capable of rotary and longitudinal movement thereon; an adjusting pin projecting inwardly from said sleeve through said adjusting slot and adapted to engage with one or another of said teeth; a disk arranged with said hollow adjusting head and engaging with the bottom thereof; and a retaining rod secured at its upper en'd to the upper part of said spindle and engaging its lower end with the top of said disk.

6. A grinding devi'ce comprising a' supporting head; a plurality of abrasive carriers movable radially on said head; opposed cones slidable radially on said supporting head'and engaging with the inner parts of said carriers; a rotary adjusting screw having ahead at its upper end engaging with one of said cones and a screw thread on itsother end engaging with the other cone; a driving spindle having a lower tubular section provided with an upwardly facing internal shoulder-and an adjustingslot in its side above said shoulder; a universal joint connecting the lower end of said tubular section with the upper end of said supporting head; and means for rotating said adjusting screw from the exterior of saidv spindle including a hollow adjusting head arranged within said tubular section and having a. spherical underside resting on said shoulder, an annular row of upwardly projecting teeth and a reduced tubular neck arranged within said tubular section and provided at its lower end with an angular opening, the edge of which is narrow and arranged in line with said universal joint:

a longitudinal coupling rod loosely connected at its lower end by a transverse pin with the head of said adjusting screw and having its upper end of angular cross section and engaging with said opening; an adjusting sleeve surrounding said tubular section and capable of rotary and longitudinal movement thereon; and an adjusting pin' projecting inwardly fromsaid sleeve through said adjusting slot and adapted to engage with one or another of said teeth, said adjusting head and shank being free to turn and tilt in said tubular neck.

" FRED M. URN.Y 

